Results 261 to 270 of about 25,571,688 (374)

Towards a more secure ATC voice communications system

, 2015
Tim H. Stelkens-Kobsch, Andreas Hasselberg, Thorsten Mühlhausen, Nils Carstengerdes, Michael Finke, Constantijn Neeteson   +5 more
openalex   +2 more sources

Anion Effect on the Thermometric Properties of Near‐Infrared Emitting Mn5+‐Activated Sr5(PO4)3X (X = F, Cl, Br) Apatite Phosphors

Advanced Optical Materials, EarlyView.
Mn5+‐activated Sr5(PO4)3X (X = F, Cl, Br) apatite phosphors exhibit tunable near‐infrared thermometric behavior across cryogenic to high temperatures. The correlation between local [PO4]3– geometry and optical properties enables the prediction of suitable hosts directly from structural information.
Michele Back, Jacopo Cangiotti, Jonas Stadulis, Arturas Katelnikovas, Mikhail G. Brik, Pietro Riello, Aleksej Zarkov   +6 more
wiley   +1 more source

Meta-encryptor with multi-dimensional security architecture for wireless communications. [PDF]

Nat Commun
Liu Y, Gao W, Fu X, Jin L, Han C, Zhang L, Cui TJ.   +6 more
europepmc   +1 more source

UWB channel measurements and modeling for positioning and communications systems in the operating room

, 2011
Mohamed R. Mahfouz, Michael Kühn
openalex   +2 more sources

From Brittle to Flexible: Influence of Glucose‐Based Additives on Cellulose Nanocrystal Self‐Assembly in Suspension and Dried Photonic Films

Advanced Optical Materials, EarlyView.
Cellulose nanocrystals (CNCs) self‐assemble in aqueous suspension into chiral nematic liquid crystals, resulting in structurally colored films upon drying. Here, the influence of sugar additives on CNC self‐assembly in suspension and in films are studied.
Buse Tatli, Alexandra R. Rousseau, Wenkui Xing, Matteo Hirsch, Emily D. Cranston, Tiffany Abitbol   +5 more
wiley   +1 more source

Detection of Communications Channels in VHF Band for Enhanced Maritime Surveillance. [PDF]

Sensors (Basel)
Lopes A, Fernandes L, Chaves P.
europepmc   +1 more source

Industrial‐Grade Structural Coloration with Robust and Vivid TiON‐Based Structures

Advanced Optical Materials, EarlyView.
This study presents TiON‐based Fabry–Perot cavities as a robust strategy for structural coloration. By substituting the metal top layer with TiON, the structures achieve vivid, tunable colors and resist oxidation, abrasion, and humidity. Long‐term testing demonstrates stable optical absorption and minimal chromatic drift, highlighting TiON's ...
Md. Abdur Rahman, Darya Burak, Kwang‐Deok Choi, Nhung Vu Cam, John You En Chan, Joel K. W. Yang, So‐Hye Cho, Sang Hoon Kim, Ji Young Byun   +8 more
wiley   +1 more source

Ultra-wideband optical diffractive network for mode multiplexing across the entire telecommunication range. [PDF]

Nat Commun
Kong A, Ren J, Wang K, Yu Y, Lin R, Wang C, Long J, Pang F, Chen X, Yan X, Wang Z, Liu B, Lei T, Yuan X.   +13 more
europepmc   +1 more source

Overview of NASA Glenn Research Center's Communications and Intelligent Systems Division

, 2016
Félix A. Miranda
openalex   +1 more source

Modeling and Improving Geometric Accuracy in Projection Multiphoton Lithography

Advanced Optical Materials, EarlyView.
A numerical framework describing the optical and photochemical processes is developed to elucidate the origins of geometric deviations in projection multiphoton lithography. The results indicate that oxygen diffusion and inhibition, and DMD diffraction, lead to geometric distortions.
Anwarul Islam Akash, Jason E. Johnson, Xianfan Xu   +2 more
wiley   +1 more source